Please also ensure that your QuickTime player is up-to-date (from QuickTime X to QuickTime 7) and is compatible with add-on/plug-in. In order to be able to playback the video file, you'll need to install the required component, add-on/plug-in (i.e., MPEG2 or Perian). Solution: QuickTime does not support the codec used to compressed the video file.
